Alto Pass was originally known as Quetil, or "Quail Gap". The community was platted on January 20, 1875, when the narrow-gauge Cairo and St. Louis Railroad was extended to that point.
The settlement developed as a railroad and agricultural shipping point. According to the Sundown Towns Database, Alto Pass was named because it was the highest elevation in Illinois traversed by a railroad, and by the turn of the 20th century the village had a post office, general stores, hotels, a blacksmith shop, a lumber yard, and other businesses serving the local fruit and vegetable trade.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (1), the National Register of Historic Places (1), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.